VT60 Specifications:


POWER OUTPUT: 50 watts per channel continuous from 20Hz to 20kHz. 1kHz total
harmonic distortion typically 1% at 50 watts, below .05% at 1 watt.
Approximate actual power available at "clipping" 52 watts (1kHz). (Note that actual power output is dependent upon both line voltage and "condition" i.e.: if power line has high distortion, maximum power will be affected adversely, although from a listening standpoint this is not very critical.) POWER BANDWIDTH: (3dB points) 15Hz to 40kHz. FREQUENCY RESPONSE: (3dB points at 1 watt) 3Hz to 40 kHz. INPUT SENSITIVITY: 1.05V RMS for rated output. 
INPUT IMPEDANCE: 100K ohms unbalanced. OUTPUT REGULATION: Approximately 0.6dB 16 ohm load to open circuit (Damping factor approximately 14). OVERALL NEGATIVE FEEDBACK: 19dB. SLEW RATE: 7 volts/microsecond. RISE TIME: 10 microseconds. HUM & NOISE: Less than 0.5mV RMS  95dB below rated output (IHF weighted, input shorted). POWER SUPPLY ENERGY STORAGE: Approximately 184 joules. 
POWER REQUIREMENTS: 105125VAC 60Hz (210250VAC 50Hz) 265 watts at rated output,
300 watts maximum, 175 watts at "idle".
TUBES REQUIRED: 2  Matched pair 6550B  Power Output; 2  6922 Driver; 1  6922 input. DIMENSIONS (VT60): 14" (35.6 cm) W x 7" (17.8 cm) H x 13.3" (33.8 cm) D. Output connectors extend 1" (2.5 cm) to the rear. WEIGHT (VT60): 33 lbs. (15.0 kg) Net; 47 lbs. (21.4 kg) Shipping. Specifications subject to change without notice. 